Systems and software engineering — Life cycle management — Part 4: Systems engineering management planning

This document: provides an expanded view of the processes from ISO/IEC/IEEE 15288 that implement systems engineering (SE) management for the life cycles of technical solutions; describes a required information item, termed the systems engineering management plan (SEMP) for the technical management and execution of the SE of technical solutions, provides requirements and guidance for the content of the required information item. This document is applicable to: those who use or plan to use ISO/IEC/IEEE 15288 on projects dealing with human-made systems, products and services; those who are responsible for the technical management of projects concerned with the engineering of systems; those responsible for planning or executing ISO/IEC/IEEE 15288 system life cycle processes at a project level; organizations and individuals involved with a technical project management effort; anyone developing engineering management documentation to complete technical planning aspects of their project’s processes. This document is intended to provide guidance for two-party situations and can be equally applied where the two parties are from the same organization. This document can also be used by a single party as self-imposed tasks. This document can also serve as guidance in multi-party situations, where high risks are inherent in the supply and integration of complex systems, and procurement can involve several suppliers, organizations or parties.

Ingénierie des systèmes et du logiciel — Gestion du cycle de vie — Partie 4: Planification de la gestion de l'ingénierie des systèmes

General Information

Status
Published
Publication Date
16-Feb-2026
Current Stage
6060 - International Standard published
Start Date
17-Feb-2026
Due Date
04-Mar-2027
Completion Date
17-Feb-2026

Relations

Effective Date
23-Sep-2023

Overview

ISO/IEC/IEEE 24748-4:2025 - “Systems and software engineering - Life cycle management - Part 4: Systems engineering management planning” - defines how projects should plan and document the technical management of systems engineering. The standard maps and expands the systems engineering processes of ISO/IEC/IEEE 15288, defines the required information item called the Systems Engineering Management Plan (SEMP), and provides requirements and guidance for the SEMP’s content. It supports modern practices including model‑based systems engineering and digital engineering, and is applicable to two‑party and multi‑party projects.

Key Topics and Requirements

  • SEMP definition and purpose: The SEMP is the top‑level technical plan that describes how the technical aspects of a project will be organized, executed and controlled to meet stakeholder requirements.
  • Process alignment: Expands and applies lifecycle processes from ISO/IEC/IEEE 15288 to technical planning and execution.
  • Content guidance: Specifies required information items and guidance for SEMP sections (introductory material, technical planning, technical management processes, technical processes, supporting activities, annexes).
  • Tailoring and conformance: Provides guidance on tailoring the SEMP to project context, including annexed tailoring policies.
  • Modern engineering practices: Addresses systems of systems, model‑based systems engineering (MBSE) and digital engineering concepts.
  • Supplementary material: Includes an expanded process view, example information item content mapping tables, and bibliographic references to support implementation.

Practical Applications

  • Use ISO/IEC/IEEE 24748-4 to create, review or audit a Systems Engineering Management Plan (SEMP) that documents technical approach, roles, processes and life cycle control for a project.
  • Apply it when integrating suppliers, managing complex procurements, or coordinating multi‑party system integration where explicit technical planning reduces risk.
  • Employ the SEMP content model for developing integrated engineering management plans, project technical procedures, or MBSE artifacts that capture the plan’s information.

Who Should Use This Standard

  • Systems engineers and systems engineering managers responsible for technical planning and execution.
  • Project managers and technical leads preparing or approving engineering plans.
  • Acquirers, suppliers and integrators participating in systems‑of‑systems or multi‑vendor programs.
  • Organizations implementing life cycle management, MBSE, or migrating to standardized technical planning practices.

Related Standards

  • ISO/IEC/IEEE 15288 (Systems life cycle processes)
  • ISO/IEC/IEEE 24748-1, 24748-2 (Life cycle management guidance)
  • ISO/IEC/IEEE 24748-7, 24748-8; ISO/IEC/IEEE 15289, 15939, 29148, 16085, 16326, 21839–21841
  • ISO/IEC/IEEE 24765 (SE vocabulary)

Keywords: ISO/IEC/IEEE 24748-4, Systems Engineering Management Plan, SEMP, systems engineering, life cycle management, technical planning, MBSE, digital engineering, ISO/IEC/IEEE 15288.

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Frequently Asked Questions

ISO/IEC/IEEE 24748-4:2026 is a standard published by the International Organization for Standardization (ISO). Its full title is "Systems and software engineering — Life cycle management — Part 4: Systems engineering management planning". This standard covers: This document: provides an expanded view of the processes from ISO/IEC/IEEE 15288 that implement systems engineering (SE) management for the life cycles of technical solutions; describes a required information item, termed the systems engineering management plan (SEMP) for the technical management and execution of the SE of technical solutions, provides requirements and guidance for the content of the required information item. This document is applicable to: those who use or plan to use ISO/IEC/IEEE 15288 on projects dealing with human-made systems, products and services; those who are responsible for the technical management of projects concerned with the engineering of systems; those responsible for planning or executing ISO/IEC/IEEE 15288 system life cycle processes at a project level; organizations and individuals involved with a technical project management effort; anyone developing engineering management documentation to complete technical planning aspects of their project’s processes. This document is intended to provide guidance for two-party situations and can be equally applied where the two parties are from the same organization. This document can also be used by a single party as self-imposed tasks. This document can also serve as guidance in multi-party situations, where high risks are inherent in the supply and integration of complex systems, and procurement can involve several suppliers, organizations or parties.

This document: provides an expanded view of the processes from ISO/IEC/IEEE 15288 that implement systems engineering (SE) management for the life cycles of technical solutions; describes a required information item, termed the systems engineering management plan (SEMP) for the technical management and execution of the SE of technical solutions, provides requirements and guidance for the content of the required information item. This document is applicable to: those who use or plan to use ISO/IEC/IEEE 15288 on projects dealing with human-made systems, products and services; those who are responsible for the technical management of projects concerned with the engineering of systems; those responsible for planning or executing ISO/IEC/IEEE 15288 system life cycle processes at a project level; organizations and individuals involved with a technical project management effort; anyone developing engineering management documentation to complete technical planning aspects of their project’s processes. This document is intended to provide guidance for two-party situations and can be equally applied where the two parties are from the same organization. This document can also be used by a single party as self-imposed tasks. This document can also serve as guidance in multi-party situations, where high risks are inherent in the supply and integration of complex systems, and procurement can involve several suppliers, organizations or parties.

ISO/IEC/IEEE 24748-4:2026 is classified under the following ICS (International Classification for Standards) categories: 35.080 - Software. The ICS classification helps identify the subject area and facilitates finding related standards.

ISO/IEC/IEEE 24748-4:2026 has the following relationships with other standards: It is inter standard links to ISO/IEC/IEEE 24748-4:2016. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.

ISO/IEC/IEEE 24748-4:2026 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.

Standards Content (Sample)


International
Standard
ISO/IEC/IEEE
24748-4
Second edition
Systems and software
2026-02
engineering — Life cycle
management —
Part 4:
Systems engineering management
planning
Ingénierie des systèmes et du logiciel — Gestion du cycle de vie —
Partie 4: Planification de la gestion de l'ingénierie des systèmes
Reference number © ISO/IEC 2026
© ISO/IEC 2026
© IEEE 2026
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting
on the internet or an intranet, without prior written permission. Permission can be requested from either ISO or IEEE at the
respective address below or ISO’s member body in the country of the requester.
ISO copyright office Institute of Electrical and Electronics Engineers, Inc
CP 401 • Ch. de Blandonnet 8 3 Park Avenue, New York
CH-1214 Vernier, Geneva NY 10016-5997, USA
Phone: +41 22 749 01 11
Email: copyright@iso.org Email: stds.ipr@ieee.org
Website: www.iso.org Website: www.ieee.org
Published in Switzerland
© ISO/IEC 2026, © IEEE 2026 – All rights reserved
ii
Contents Page
Foreword .v
Introduction .vii
1 Scope . 1
2 Normative references . 1
3 Terms, definitions and abbreviated terms . 1
3.1 Terms and definitions .1
3.2 Abbreviated terms .3
4 Conformance . 3
4.1 Intended usage .3
4.2 Full conformance .4
4.3 Tailored conformance .4
5 Key concepts and their application
.............................................................................................................................................................. 4
5.1 General .4
5.2 System concepts .4
5.3 Life cycle concepts .5
5.4 Process concepts .5
5.5 Organizational concepts .5
5.6 Project concepts .5
5.7 System of system concepts .5
5.8 Model-based SE and digital engineering concepts .6
5.9 Information items concepts .7
5.10 SEMP development concepts .7
6 SEMP content . . 8
6.1 General .8
6.2 Introductory material .10
6.3 Technical planning .10
6.3.1 Purpose, scope and objectives .10
6.3.2 Assumptions, dependencies and constraints .11
6.3.3 Schedule and budget summary .11
6.3.4 References . 12
6.3.5 Definitions . 12
6.3.6 Technical project organization . 12
6.3.7 Life cycle model selection and adaptation . 13
6.3.8 Process model selection and tailoring . 13
6.3.9 Infrastructure and services required .14
6.3.10 Communications .14
6.3.11 Tools, methods and techniques .14
6.4 Technical management processes . 15
6.4.1 Planning content from project assessment and control process. 15
6.4.2 Planning content from decision management process .17
6.4.3 Planning content from risk management process .17
6.4.4 Planning content from configuration management process .18
6.4.5 Planning content from information management process . 20
6.4.6 Planning content from measurement process .21
6.4.7 Planning content from quality assurance process . 22
6.5 Technical processes . . 23
6.5.1 Planning content from business or mission analysis process . 23
6.5.2 Planning content from stakeholder needs and requirements definition process . 23
6.5.3 Planning content from system requirements definition process .24
6.5.4 Planning content from system architecture definition process .24
6.5.5 Planning content from design definition process . 25
6.5.6 Planning content from system analysis process . 25
6.5.7 Planning content from implementation process. 26

© ISO/IEC 2026, © IEEE 2026 – All rights reserved
iii
6.5.8 Planning content from integration process . 26
6.5.9 Planning content from verification process .27
6.5.10 Planning content from transition process .27
6.5.11 Planning content from validation process . 28
6.5.12 Planning content from operation process . 28
6.5.13 Planning content from maintenance process . 28
6.5.14 Planning content from disposal process . 29
6.6 Supporting SE activities and plans . 29
6.6.1 General . 29
6.6.2 Other plans . 29
6.6.3 Traceability . 30
6.6.4 Interface management . 30
6.6.5 Critical quality characteristics . 30
6.6.6 Each required critical quality area . 30
6.6.7 Technology management .31
6.7 Annexes .31
6.7.1 General .31
6.7.2 Organizational project enabling processes .31
6.7.3 Agreement processes . 34
Annex A (normative) Tailoring policies .35
Annex B (informative) Expanded process view for systems engineering management planning .37
Annex C (informative) Example information item content mapping tables .48
Bibliography .51
IEEE notices and abstract .52

© ISO/IEC 2026, © IEEE 2026 – All rights reserved
iv
Foreword
ISO (the International Organization for Standardization) and IEC (the International Electrotechnical
Commission) form the specialized system for worldwide standardization. National bodies that are
members of ISO or IEC participate in the development of International Standards through technical
committees established by the respective organization to deal with particular fields of technical activity.
ISO and IEC technical committees collaborate in fields of mutual interest. Other international organizations,
governmental and non-governmental, in liaison with ISO and IEC, also take part in the work.
The procedures used to develop this document and those intended for its further maintenance are described
in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the different types
of document should be noted. This document was drafted in accordance with the editorial rules of the ISO/
IEC Directives, Part 2 (see www.iso.org/directives or www.iec.ch/members_experts/refdocs).
IEEE Standards documents are developed within IEEE Societies and subcommittees of IEEE Standards
Association (IEEE SA) Board of Governors. IEEE develops its standards through an accredited consensus
development process, which brings together volunteers representing varied viewpoints and interests to
achieve the final product. IEEE standards are documents developed by volunteers with scientific, academic,
and industry-based expertise in technical working groups. Volunteers are not necessarily members of
IEEE or IEEE SA and participate without compensation from IEEE. While IEEE administers the process and
establishes rules to promote fairness in the consensus development process, IEEE does not independently
evaluate, test, or verify the accuracy of any of the information or the soundness of any judgments contained
in its standards.
ISO and IEC draw attention to the possibility that the implementation of this document may involve the
use of (a) patent(s). ISO and IEC take no position concerning the evidence, validity or applicability of any
claimed patent rights in respect thereof. As of the date of publication of this document, ISO and IEC had not
received notice of (a) patent(s) which may be required to implement this document. However, implementers
are cautioned that this may not represent the latest information, which may be obtained from the patent
database available at www.iso.org/patents and https://patents.iec.ch. ISO and IEC shall not be held
responsible for identifying any or all such patent rights.
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and expressions
related to conformity assessment, as well as information about ISO's adherence to the World Trade
Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www.iso.org/iso/foreword.html.
In the IEC, see www.iec.ch/understanding-standards.
This document was prepared by Joint Technical Committee ISO/IEC JTC 1, Information technology,
Subcommittee SC 7, Software and systems engineering, in cooperation with the Systems and Software
Engineering Standards Committee of the IEEE Computer Society, under the Partner Standards Development
Organization cooperation agreement between ISO and IEEE.
This second edition cancels and replaces the first edition (ISO/IEC/IEEE 24748-4:2016), which has been
technically revised.
The main changes are as follows:
— aligns with updates to ISO/IEC/IEEE 15288:2023, ISO/IEC/IEEE 24748-1:2024, ISO/IEC/IEEE 24748-2:2024,
ISO/IEC/IEEE 16085:2021, and ISO/IEC/IEEE 29148:2018;
— streamlines and reduces redundancies from the publication of ISO/IEC/IEEE 16326:2019;
— maintains harmonization with new documents within the SC 7 portfolio, including
ISO/IEC/IEEE 15289, ISO/IEC/IEEE 15939, ISO/IEC/IEEE 21839, ISO/IEC/IEEE 21840, ISO/IEC/IEEE 21841,
ISO/IEC/IEEE 24748-7 and ISO/IEC/IEEE 24748-8;
— addresses feedback from users and the advancement of system-related technologies, including systems
of systems and model-based systems and software engineering;

© ISO/IEC 2026, © IEEE 2026 – All rights reserved
v
— adds a new annex with an expanded process view for systems engineering management planning;
— adds a new annex with example information item content mapping tables;
— removes provisions for conformance to process.
A list of all parts in the ISO/IEC/IEEE 24748 series can be found on the ISO and IEC websites.
Any feedback or questions on this document should be directed to the user’s national standards
body. A complete listing of these bodies can be found at www.iso.org/members.html and
www.iec.ch/national-committees.

© ISO/IEC 2026, © IEEE 2026 – All rights reserved
vi
Introduction
ISO/IEC/IEEE 15288 provides a common process framework covering the life cycle of human-made systems,
from the conception of ideas through to the retirement of a system. It provides the processes for acquiring
and supplying systems. In addition, this framework provides for the assessment and improvement of the life
cycle processes. This common framework improves communication and cooperation among the parties that
create, utilize, and manage modern systems in order that they can work in an integrated, coherent fashion.
The acquisition or supply of a system is usually done within a project. A project prepares and implements
the technical planning, resources and schedules necessary to guide the project toward accomplishment
of its objectives and proper conclusion. The project’s authorization and objectives are documented in an
information item typically identified as a systems engineering management plan (SEMP).
This document defines a SEMP as the key vehicle for representing a project's application of systems life cycle
processes. In this document, the terms technical planning and systems engineering (SE) planning are used
interchangeably to emphasize or differentiate technical contributions in the processes under discussion.
In many organizations, the various responsibilities of technical management are assigned to more than one
person. Where the term "technical manager" or "systems engineering manager" is used in this document, the
guidance, advice or normative requirement applies to the applicable role within the project or organization.
NOTE ISO/IEC/IEEE 24748-1 and ISO/IEC/IEEE 24748-2 provide guidance on the application of
ISO/IEC/IEEE 15288, including definition or expansion of important organization, project, process, and life cycle
model concepts and their adaptation for successful project implementation.

© ISO/IEC 2026, © IEEE 2026 – All rights reserved
vii
International Standard ISO/IEC/IEEE 24748-4:2026(en)
Systems and software engineering — Life cycle
management —
Part 4:
Systems engineering management planning
1 Scope
This document:
— provides an expanded view of the processes from ISO/IEC/IEEE 15288 that implement systems
engineering (SE) management for the life cycles of technical solutions;
— describes a required information item, termed the systems engineering management plan (SEMP) for
the technical management and execution of the SE of technical solutions,
— provides requirements and guidance for the content of the required information item.
This document is applicable to:
— those who use or plan to use ISO/IEC/IEEE 15288 on projects dealing with human-made systems,
products and services;
— those who are responsible for the technical management of projects concerned with the engineering of
systems;
— those responsible for planning or executing ISO/IEC/IEEE 15288 system life cycle processes at a project
level;
— organizations and individuals involved with a technical project management effort;
— anyone developing engineering management documentation to complete technical planning aspects of
their project’s processes.
This document is intended to provide guidance for two-party situations and can be equally applied where
the two parties are from the same organization. This document can also be used by a single party as self-
imposed tasks.
This document can also serve as guidance in multi-party situations, where high risks are inherent in the
supply and integration of complex systems, and procurement can involve several suppliers, organizations or
parties.
2 Normative references
There are no normative references in this document.
3 Terms, definitions and abbreviated terms
3.1 Terms and definitions
For the purposes of this document, the following terms and definitions apply.

© ISO/IEC 2026, © IEEE 2026 – All rights reserved
ISO, IEC and IEEE maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
— IEEE Standards Dictionary Online: available at https:// ieeexplore .ieee .org/ xpls/ dictionary .jsp
NOTE For additional terms and definitions in the field of systems and software engineering, see
ISO/IEC/IEEE 24765, which is published periodically as a “snapshot” of the SEVOCAB (Systems and software
Engineering Vocabulary) database and which is publicly accessible at http:// www .computer .org/ sevocab.
3.1.1
audit
systematic, independent and documented process for obtaining objective evidence and evaluating it
objectively to determine the extent to which the audit criteria are fulfilled
[SOURCE: ISO 9000:2015, 3.13.1, modified — Notes to entry have been removed.]
3.1.2
include
has either the information or a reference to the information
[SOURCE: ISO/IEC/IEEE 15289:2019, 3.1.11]
3.1.3
information item
separately identifiable body of information that is produced, stored, and delivered for human use
Note 1 to entry: A document produced to meet information requirements can be an information item, part of an
information item, or a combination of several information items.
Note 2 to entry: An information item can be produced in several versions during a project or system life cycle.
[SOURCE: ISO/IEC/IEEE 15289:2019, 3.1.12]
3.1.4
measure of effectiveness
MoE
measures that define the acquirer’s key indicators of achieving the mission needs for performance, suitability
and affordability across the life cycle
[SOURCE: INCOSE Systems Engineering Handbook, 5th ed., © 2023 John Wiley & Sons Ltd. Used with
permission.]
3.1.5
measure of performance
MoP
measure to assess whether the system meets design or performance requirements and has the capability to
achieve operational objective
[SOURCE: INCOSE Systems Engineering Handbook, 5th ed., © 2023 John Wiley & Sons Ltd. Used with
permission.]
3.1.6
plan
information item (3.1.3) that presents a systematic course of action for achieving a declared purpose,
including when, how, and by whom specific activities are to be performed
[SOURCE: ISO/IEC/IEEE 15289:2019, 3.1.16]

© ISO/IEC 2026, © IEEE 2026 – All rights reserved
3.1.7
systems engineering management plan
SEMP
top-level technical plan (3.1.6) for managing the systems engineering effort which defines how the technical
aspects of the project will be organized, structured, and conducted and how the systems life cycle processes
will be controlled to provide a product that satisfies stakeholder requirements
Note 1 to entry: An alternate title, such as a systems engineering plan (SEP), can be used.
Note 2 to entry: The content of the SEMP can be incorporated into another plan such as a single integrated engineering
management plan (IEMP) that includes other management plans such as project, configuration management and risk.
Note 3 to entry: The content of the SEMP can be distributed across multiple plans.
Note 4 to entry: This document does not prescribe the form of the information item (3.1.3). The content of the SEMP
can be in the form of documents or models or other form(s) appropriate to the context of the project.
3.1.8
technical performance measure
TPM
measure to assess design progress, compliance to performance requirements, or technical risks and provide
visibility into the status of important technical parameters to enable effective management, thus enhancing
the likelihood of achieving the technical objectives of the project
[SOURCE: INCOSE Systems Engineering Handbook, 5th ed., © 2023 John Wiley & Sons Ltd. Used with
permission.]
3.2 Abbreviated terms
CS constituent system
DE digital engineering
INCOSE International Council on Systems Engineering
MBSE model-based systems engineering
MBSSE model-based system and software engineering
PMP project management plan
PLM product life cycle management
QA quality assurance
SE systems engineering
SEP systems engineering plan
SoI system of interest
SoS system of systems
WBS work breakdown structure
4 Conformance
4.1 Intended usage
This document provides guidance for the execution of the ISO/IEC/IEEE 15288 processes related to the
planning and managing a project to implement a significant technical effort. This document also provides

© ISO/IEC 2026, © IEEE 2026 – All rights reserved
normative definition of the content and recommendations for the related information item, the project's
SEMP.
4.2 Full conformance
This document provides one approach to the requirements for an information item – the SEMP.
A claim of full conformance to this document means that:
— the user produces the required information item stated in this document; and
— the user demonstrates that the information item produced during the project planning activities
conforms to the content requirements defined in this document.
The requirements for the information item in this document are contained in Clause 6.
The requirements for the content of the information item in this document are contained in Clause 6.
This document addresses all of the information item elements of ISO/IEC/IEEE 15289:2019, 7.3 and 10.42,
but does not assert a claim of conformance to that document.
NOTE 1 If a user of this document claims full conformance to ISO/IEC/IEEE 15289, it does not imply that the user
can claim conformance to the information items and information item content in this document. The reason is that
this document adds additional information items and additional detail.
NOTE 2 In this document, for simplicity of reference, an information item is described as if it were published as a
separate document. However, information items are considered as conforming if they are unpublished but available in
a repository for reference or divided into separate documents or volumes.
4.3 Tailored conformance
The tailoring process shall be in accordance with Annex A.
5 Key concepts and their application
5.1 General
This clause presents concepts that apply to and are necessary to understand the SE planning aspects of a
project and for the development and content of a project's SEMP.
The agreement processes of ISO/IEC/IEEE 15288 define the activities necessary to establish an agreement
between two organizations. The organizational project-enabling processes of ISO/IEC/IEEE 15288 are
concerned with providing the resources needed to enable the project to meet the needs and expectations of
the organization’s stakeholders. The technical management processes of ISO/IEC/IEEE 15288 are concerned
with managing the resources and assets allocated by organization management and with applying them
to fulfil the agreements into which the organization or organizations enter. The technical processes of
ISO/IEC/IEEE 15288 are concerned with technical actions throughout the life cycle. Technical processes
transform the needs of stakeholders into products or services.
This document unifies and supplements the extensive application information available to assist
organizations and project management teams in their SE management planning.
Development of a SEMP presupposes an understanding of several key concepts. Foundational material that
explains these concepts is discussed or identified in 5.2 to 5.10.
5.2 System concepts
System concepts for systems that are any mix of products and services are introduced in
ISO/IEC/IEEE 15288:2023, 5.2. Additional discussion is in ISO/IEC/IEEE 24748-1:2024, 4.2, which explains
systems, system boundaries, structure in systems and projects, and enabling systems.

© ISO/IEC 2026, © IEEE 2026 – All rights reserved
5.3 Life cycle concepts
System life cycle concepts are introduced in ISO/IEC/IEEE 15288:2023, 5.5. Additional discussion is in
ISO/IEC/IEEE 24748-1:2024, 4.3.
Project life cycle concepts and application are addressed in ISO/IEC/IEEE 16326.
[20]
The INCOSE SE Handbook discusses system life cycle concepts in terms of business, budget and technical
aspects, and project cycles in terms of decision gates. Discussion of different methods, implementation
strategies and case studies highlight some of the decisions facing organizations and projects in determining
appropriate system and life cycle models to employ. Planning and management need to account for the SoS
considerations in ISO/IEC/IEEE 21839 and plan in the context of ISO/IEC/IEEE 21840.
5.4 Process concepts
ISO/IEC/IEEE 24774 provides foundational discussion of process concepts to encourage consistency
in development of standard process reference models. It presents guidelines for the elements used most
frequently in describing a process: the title, purpose, outcomes, activities, tasks and information items.
Process concepts are introduced in ISO/IEC/IEEE 15288:2023, 5.6.
ISO/IEC/IEEE 15288 establishes a top-level framework of the life cycle of systems from conception through
retirement. The framework is constructed with a set of processes and interrelationships among these
processes.
The recursive, iterative and concurrent application of processes is discussed in ISO/IEC/IEEE 15288:2023,
5.8.2.
5.5 Organizational concepts
An identified part of an organization (even as small as a single individual) or an identified group of
organizations can be regarded as an organization, if it has responsibilities, authorities and relationships.
In ISO/IEC/IEEE 15288, when an organization, as a whole or a part, enters into an agreement, it is a “party”
to the agreement. Organizations are separate bodies, but the parties can be from the same organization or
from separate organizations.
Organizational concepts, such as responsibility, organizational relationships and project organizational
structure, are discussed in ISO/IEC/IEEE 24748-2:2024, 6.5 and ISO/IEC/IEEE 15288:2023, 5.3.
5.6 Project concepts
A project can be viewed as a single endeavour, unique in its purpose and consisting of various implemented
life cycle processes.
ISO/IEC/IEEE 24748-1:2024, 4.2.3 discusses system structure and implications in projects.
ISO/IEC/IEEE 24748-1:2024, 4.2.4, explains enabling systems in terms of the system-of-interest and its
operational environment.
ISO/IEC/IEEE 24748-2:2024, 6.6, discusses project concepts, relationships among projects, project
relationships with enabling systems and hierarchy of projects.
ISO/IEC/IEEE 16326 provides more information on project management and the information item, project
management plan (PMP).
5.7 System of system concepts
A system of systems (SoS) is a set of systems that interact to provide a unique capability that none of the
constituent systems (CS) can accomplish on its own. In the context of SoS, the relevant pieces of the system

© ISO/IEC 2026, © IEEE 2026 – All rights reserved
of interest (SoI) are, by definition, systems themselves. An SoS consists of some number of CS, plus any inter-
system infrastructure, facilities, and processes necessary to enable the CS to integrate or interoperate.
An essential characteristic of the SoS is that CS within the SoS are operationally independent. That is, the CS
can (and do) operate independently to fulfil some number of purposes on their own, separate from the SoS.
While CS operate independently from each other for their own purposes, they also operate interdependently
with each other and other elements to produce the SoS outputs. CS are never totally independent, yet they
are also never totally subservient to the SoS.
Another essential characteristic is that CS within the SoS are both managerially independent and
interdependent. Managerial independence suggests that the CS can be managed by organizations that
retain some degree of independence even though they are interdependent while participating in SoS. The
implication is that these organizations can have goals and objectives for the CS that differ from those of the
SoS and the other CS. If so, there is likely some degree of independence and interdependence of governance,
as well as some degree of independence and interdependence of management. For systems that participate
in SoS, the SEMP should elaborate shared or distributed responsibilities for interface management,
configuration control, and governance agreements across organizational boundaries.
Using essential characteristics to partition the various types of SoS provides an abbreviated nomenclature
for thinking about SoS. ISO/IEC/IEEE 21841 defines a normalised taxonomy for SoS to facilitate
communications among stakeholders. It also briefly explains what a taxonomy is and how it applies to the
SoS to aid in understanding and communication. There are many characteristics such as scale and scope,
around which taxonomies can be derived.
ISO/IEC/IEEE 21839 provides a set of SoS considerations to be addressed at key points in the life cycle of
the SoI. The considerations and key points align with those which are introduced in this document. Selected
subsets of these considerations can be applied throughout the life of systems through the involvement of
stakeholders. The ultimate goal is to achieve stakeholder satisfaction, so that when delivered, the SoI
operates effectively in the operational environment which is typically characterized as one or more systems
of systems.
ISO/IEC/IEEE 21840 provides guidance for the utilization of this document in the context of SoS. While
this document applies to systems in general (including CS), ISO/IEC/IEEE 21840 provides guidance on the
application of these processes to the special case of SoS.
5.8 Model-based SE and digital engineering concepts
Model-based SE (MBSE) or model-based systems and software engineering (MBSSE) is “formalized
[9]
applications of modelling to support systems and software engineering.” Digital engineering (DE)
[21]
facilitates a shift from a design-build-test approach to a model-analyse-build approach .
ISO/IEC/IEEE 24641 deals with the tool capabilities and methods for model-based systems and software
engineering (MBSSE). ISO/IEC/IEEE 24641:
— specifies a reference model for the overall structure and processes of MBSSE-specific processes, and
describes how the components of the reference model fit together;
— specifies interrelationships between the components of the reference model;
— specifies MBSSE-specific processes for model-based systems and software engineering; the processes
are described in terms of purpose, inputs, outcomes and tasks;
— specifies methods to support the defined tasks of each process;
— specifies tool capabilities to automate or semi-automate tasks or methods.
ISO/IEC/IEEE 24641 does not bring any additional life cycle processes for system and software but specifies
an MBSSE reference model considered as activities, not only from the life cycle perspectives of SE problem
solving and the system-of-interest evolution, but also from the cognitive perspectives of modelling and
model management, which can sustain and facilitate the system and software life cycle processes during
digital transformation and in the digital age.

© ISO/IEC 2026, © IEEE 2026 – All rights reserved
5.9 Information items concepts
ISO/IEC/IEEE 15289 provides more detail on information items and specifies how life cycle data is managed
in information items.
NOTE This document uses the term “include” in the same sense as ISO/IEC/IEEE 15289:2019, 3.1.11, that the
information “has either the information or a reference to the information.”
ISO/IEC/IEEE 15289 indicates that an information item is required to be consistent with an information
item generic type. The key information item addressed in this document is of type plan.
As noted in ISO/IEC/IEEE 24748-2:2024, 6.7.4.1, “Plans are developed to define project goals and objectives
(why?), the work that needs to be accomplished (what?), the project schedule (when?), the project
organizational structure (who?), and how the organization’s processes, policies and procedures are adapted
to match project-specific needs (how?). Plans should include the scope, tasks, methods, tools, measures, risks
and resources for applicable system or system element implementation, integration, verification, transition
and validation processes, so that each contingency option can be efficiently and effectively used.”
ISO/IEC/IEEE 15289:2019, Clause 7 identifies several generic types of information items and provides
generic content for each information item type.
ISO/IEC/IEEE 15289:2019, 7.3 provides generic content elements for plans.
Each information item produced as a document supports certain life cycle data characteristics. Documents
are produced and communicated for human use and contain formal elements (such as purpose, scope, and
summary), intended to make them usable by their intended audience.
ISO/IEC/IEEE 15289:2019, 6.4 provides requirements for the management of information items through
the application of ISO/IEC/IEEE 15288 processes. These include the information management process and
select activities from the knowledge management process.
5.10 SEMP development concepts
Systems engineering management planning can be applied for technical efforts as practiced across an entire
organization, or to specific projects The SEMP should be developed in the earliest project planning stages.
It is tightly coupled with Project Management Plan (PMP) development and content. Although sometimes
combined with the PMP, the SEMP is typically a separate information item that focuses on managing the
technical project management effort.
The SEMP provides an explanation of what needs to be done, how it will be done, who will do it, when it will
be done and where it will be done; as well as how much of a resource is necessary to do the work for each
technical process. The SEMP explains these activities and tasks within established constraints of resources
and staff and in order to meet cost, schedule and performance requirements within acceptable risks.
A SEMP should be periodically updated as plans are solidified or modified, activities move from plans to
historical facts, known risks are mitigated or significantly changed, new risks are identified, new tools
and technologies are adopted, and as a myriad of other factors cause an adjustment to the project’s overall
technical approach. Thus, it is expected that the SEMP will evolve over time and go through revisions when a
new agreement is awarded, or as the project moves from stage to stage. The SEMP should include versioning
and change history tracking, aligned with the project's configuration management plans. The SEMP should
reference or provide a link to other relevant planning information items, especially those that include more
detailed planning information for topics in the SEMP.
ISO/IEC/IEEE 16326 supplements the technical management processes of ISO/IEC/IEEE 15288, providing
detailed guidance and normative content specifications for project management plans. ISO/IEC/IEEE 16326
notes that a SEMP is typically developed at a lower level of abstraction than the PMP to address and gather
most of the other plans required to satisfy product requirements and agreement terms (e.g. specialty plans
for safety, security, training, integration, transition). Technical plans such as the SEMP need to coordinate the
technical and management aspects of a project (or many projects) across one or more organizations to help
ensure successful achievement of organizational and agreement goals for the proj
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